How can you make it so a sprite can't touch another sprite?

TheOfficialDerpCo

We're making a platformer, and we're trying to make it so the sprite can't go through other sprites. We've found a way, though sometimes it glitches.
It goes like this:

when I receive

forever
    
if <<key [left arrow] pressed?> and <not <touching [thatpeskyground] ?>>> then
    
change x by (-8)
next costume
point in direction (-90)
end

end

Halp!

lederniersamourai

Sometimes, when you step 8 units, sprites can touch each other.
So you have to test after the move and go back until not touching. When you go back, try to do it with smaller steps, but in any case try to be exactly at the initial place.

when I receive [Start]
forever
if <<key [left arrow] pressed?> and <not <touching [thatpeskyground] ?>>> then
change x by (-8)
repeat until <not <touching [thatpeskyground] ?>>
    change x by (-4)
end
next costume
point in direction (-90)
end
end

TheOfficialDerpCo

Very interesting… Thanks for the thought.

gtoal

There are two sprite-based ways to do this.

1) just move - if it touches, move back before the screen updates.

2) create an invisible sprite that is like the actual sprite but with an <n>-pixel wide boundary added to it. Then move until the boundary sprite touches the target. As long as your moves are not so large that the actual sprite can touch the target in a single move (ie < n), it should alert you before they actually collide.

TheOfficialDerpCo

THANK YOU SO MUCH! THAT WORKS SO MUCH BETTER!

DamoDog

gtoal wrote:
There are two sprite-based ways to do this.

1) just move - if it touches, move back before the screen updates.

2) create an invisible sprite that is like the actual sprite but with an <n>-pixel wide boundary added to it. Then move until the boundary sprite touches the target. As long as your moves are not so large that the actual sprite can touch the target in a single move (ie < n), it should alert you before they actually collide.

How would you move it back before a screen updates? i.e. a script example?

HOMELESSpotato08

im stuck

lillywill

how do you make a sprite that can touch another sprite but not go through it. im trying to make a game put when the person moves around it keeps going through walls and stuff.

Fischer57

lillywill wrote:
how do you make a sprite that can touch another sprite but not go through it. im trying to make a game put when the person moves around it keeps going through walls and stuff.

HOMELESSpotato08 wrote:
im stuck

Guys lease make another forum about this. This is Necroposting.

latin_gamerX

forever
if <touching [sprite v] ?> then
change x by (15)
change y by (15)
end
end

Fischer57

latin_gamerX wrote:

forever
if <touching [sprite v] ?> then
change x by (15)
change y by (15)
end
end

Please don't necropost

0nonimus_Goomber2

Step 1: When Green Flag Clicked Block.
Step 2: Set Default position.
Step 3: Do A Forever Block.
Step 4: Do an If _____ Then Block.
Step 5: Change X and Y to 5 and 5 then -5 and -5

when green flag clicked
switch costume to [ v]
set x to ()
set y to ()
forever

if <> then
change x by ()
change y by ()
endend

0nonimus_Goomber2

Step 1: When Green Flag Clicked Block.
Step 2: Set Default position.
Step 3: Do A Forever Block.
Step 4: Do an If _____ Then Block.
Step 5: Change X and Y to 5 and 5 then -5 and -5

when green flag clicked
switch costume to [ 1]
set x to ()
set y to ()
forever

if <> then
<touching [ sprite ?] ?>
change y by (5)
change x by (5)
endend

theanonymousweirdo

0nonimus_Goomber2 wrote:
Step 1: When Green Flag Clicked Block.
Step 2: Set Default position.
Step 3: Do A Forever Block.
Step 4: Do an If _____ Then Block.
Step 5: Change X and Y to 5 and 5 then -5 and -5
when green flag clicked
switch costume to [ v]
set x to ()
set y to ()
forever

if <> then
change x by ()
change y by ()
endend

Please check the date that the topic was originally posted before posting. This topic was made in 2016

Last edited by theanonymousweirdo (Oct. 22, 2020 00:36:08)

FLORAIDER

when green flag clicked
forever
if <touching [ Wall] ?> then
change x by (15)
change y by (15)
move (10) steps
end
end
<[Me] = [Hope i helped :D]>

Last edited by FLORAIDER (Nov. 17, 2020 03:24:48)

mysterious-neutron

FLORAIDER wrote:

when green flag clicked
forever
if <touching [ Wall] ?> then
change x by (15)
change y by (15)
move (10) steps
end
end
<[Me] = [Hope i helped :D]>

Please don't necropost

Bannervessel6

Hey! uh, I'm trying to make it so that one of my sprites and stand on another sprite the “ground” sprite, this is not the actual ground sprite that I have, just a different one, but how do I make it so that it can go on top of it?

goldenlion06

when green flag clicked
forever
(make sure this does have run without screen refresh) get outta ceiling
end

define (make sure this does have run without screen refresh) get outta floor/ceiling
if <touching [floor/ceiling] ?> then
repeat until <<not <<touching [floor/ceiling ] ?>
change y by (1 or -1)
end

end

Last edited by goldenlion06 (Feb. 6, 2021 17:19:18)

goldenlion06

change the “if touching floor to wall and set the change y by to change x by” to make it for walls

goldenlion06

FLORAIDER wrote:

when green flag clicked
forever
if <touching [ Wall] ?> then
change x by (15)
change y by (15)
move (10) steps
end
end
<[Me] = [Hope i helped :D]>

bro what if the wall isnt 15 pixels long? thas why you look at my comment and see that it changes x/y by 1 or -1 repeatedly without the any changes on screen so it stops exactly at the wall and doesnt even seem like you went through wall

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